Fountain pen



NOV 1 2, 1929 G. w. ELMWALL N 1,735,566

FOUNTAIN PEN Filed June l5, 1926 mgm PSMMA'M.

Patented Nov. 12, 19.29

GUSTAVE WALFRID ELMWALL, rF NEW YORK, N'. Y.

roun'rnn PEN a Application filed June 1li,

This invention relates'to writing instru'- ments and more especially to fountain pens of the self-filling type.

It is an object of this invention to provide 5 means whereby the construction of such instruments may be simplified and cheapened while their efliciency is substantially increased.

It is the principal purpose of this invention to provide a simplified fountain penl structure having in itself all of the improved -facilities common to instruments formerly manufactured, while certainof the parts heretofore thought necessaryare eliminated.

have commonly employed specially constructed rubber bags which must be made as an individual unit part for each pen so constructed, whereas the herein disclosed inven- 29 tion provides for the use of standard rubber tubing which may be cut from the manufactured product as required. Furthermore, such prior pens have in general required the manipulation of thumb latches, levers or the like, which form permanent or temporary v protuberances from the pen barrel and which detract from the appearance and convenience of the same; whereas this present invention p'ovides a pen barrel wherein no protrurances are necessary and wherein the simpleA manipulation of a part of the pen barrel itself accomplishes -the filling of the pen or the forceful ejection of liquid therefrom if necessary for cleaning purposes orthe like.

It is the particular purpose of this invention to provide a fountain pen which will have a cylindrical outer surface without protrubance or irregularity to catch in the 40.users clothing, which will provide the selfl filling feature which will' employ standard parts which can be completely evacuated without repeated operations necessary to pens of the lever type, land which at the Sametime will 'be capable of manufacture by the use of simple machinery'and with the elimination of special parts.

, Referring in particularfto the drawings whichy form a part of this specification;`

Fig. 1 is a cross-sectional elevation` of one Fountain pens common to the prior art 1926. Serial No. 116,121.

embodiment of my invention with the ink sack in the extended or full position;

y Fig. v2 is an elevation of the embodiment shown in Fig. 1 with certain parts broken away for purposes of illustration and with 55 the whole turned 90 degreeson its vertical axls.

The barrel body 10 is turned in its inner surface as at 11 to engage the body point 12, wherein is provided a channel 14 mount- 63 ing the pen point 16, held in place by the plug 18, which is lsuitably grooved as at 19. to receive the feeding channel 20. The upper end of barrel bodv 10 is preferably threaded as at 21 to engage the end or cap portion 22, 65 having thereinan elongated recess 24 wherein the' member -26 slides. Member26 is provided with a substantially circular enlargement 28 at its lower end and it is to this portion that the upper end of ink sack 30 70 1s secured by cementing or like operation. The stem portion, or member 26, is preferably rectangular in cross-section and is substantially wider than it thick so that-it serves as a key whereby the sack engaging portion 28 1s rotated when barrel cap 22 is manipulated.

Ink sack 30 may be formed of a section .from any suitable rubber tubing or like flexible 'conduit and has its lower end securely 80 cemented'to the bibb 12b of the portion 12 so as to communicate with channel 14. l

Feeding channel 20 consists of a piece of metal grooved to substantially'V shape and extends throughout the length of groove 19 in 35 l plug 18, its lower' extremity curving for-ward slightly below the eye 17 in the pen 16 so that Vthe ink 1s fed downward and forward through the eye over the pen. l

The operation of ltheimproved pen is ac- 9 .complished by the simple twisting of cap 22 whose normal position is shown in Fig. 1 and whose twisted position is shown in Fig.

2. It willbe noted that the stem of portion 26 sliding within the recess 24 in cap 22 95 compensates for thelessened length of the i ink sack and for the `greater len h of the pen barrel as cap 22 unscrews. ninspec tionv of Fig. 2'will show that the ink sack may be squeezed, or rather wrung, completely 10a.

recess in sai sllde wlthout restramt 1n either axlal direcfree of all liquid and that a single twisting operation will free the ink sack of unclean liquid and of air producing a complete evacuation for relling which will thus be made complete without repeated manipulation.-

Manifestly many changes and modifications may be made in my simplified structure as an instance of which may be cited the substitution of a pen or other marking, drawing, or painting, device wellknown to those skilled in the art in the place offpen 16; all of this within the scope of my invention and within the spirit of the appendedclaim.

What I claim isf A In a fountain pen of the self filling type, a one-piece body barrel internally threaded at its upper end, a point portion aixed to n the lower end of said body barrel 4having pen mounting and feeding'means thereon, a cap portion externally threaded and engaging the thread in said body barrel, said cap having a longitudinal bore therein having fiat sides, a fiat slded solid key engaged with the cap to turn therewith and to tion longitudinally therein when the cap is rotated, a flexible open ended tube ink sack having one of its ends secured to the upper end of said point portion and the other end vto the lower extremity of said key portion whereby rotation of said cap screws the same on the aforesaid. threads without" disengage-- ment to simultaneously twist the said tube sack to squeeze the same without longitudinal p stretch.

signed at New? York, New' York', this 1st day-of June, 1926.

GUSTAVE wALFRID ELMWALL. 

